<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>字体小于12px</title>
    <style>
            div{
                -webkit-text-size-adjust: none;
                font-size: 8px;
            }

    </style>
</head>
<body>
    <div>你好</div>
    <span>你好</span>

    <script>
        console.log(null+1);
        console.log(undefined+1);
        console.dir(Object);
        console.log(typeof NaN);
        console.log(typeof 1/0);
    </script>
</body>
</html>